WO2010018979A2 - Procédé et appareil pour la transmission d’information dans un système de radiocommunication - Google Patents

Procédé et appareil pour la transmission d’information dans un système de radiocommunication Download PDF

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Publication number
WO2010018979A2
WO2010018979A2 PCT/KR2009/004479 KR2009004479W WO2010018979A2 WO 2010018979 A2 WO2010018979 A2 WO 2010018979A2 KR 2009004479 W KR2009004479 W KR 2009004479W WO 2010018979 A2 WO2010018979 A2 WO 2010018979A2
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WIPO (PCT)
Prior art keywords
transmission
symbol
sequence
index
information
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PCT/KR2009/004479
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English (en)
Korean (ko)
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WO2010018979A3 (fr
Inventor
한승희
이문일
권영현
고현수
구자호
김동철
정재훈
문성호
곽진삼
노민석
이현우
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엘지전자주식회사
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Application filed by 엘지전자주식회사 filed Critical 엘지전자주식회사
Priority to US13/058,395 priority Critical patent/US8385467B2/en
Publication of WO2010018979A2 publication Critical patent/WO2010018979A2/fr
Publication of WO2010018979A3 publication Critical patent/WO2010018979A3/fr
Priority to US13/743,176 priority patent/US8611464B2/en
Priority to US14/091,071 priority patent/US8873673B2/en
Priority to US14/495,472 priority patent/US8989304B2/en
Priority to US14/626,744 priority patent/US9094156B2/en
Priority to US14/744,738 priority patent/US9197383B2/en
Priority to US14/886,582 priority patent/US9537621B2/en
Priority to US15/348,797 priority patent/US9641293B2/en

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Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting information in a wireless communication system.
  • the next generation multimedia wireless communication system which is being actively researched recently, requires a system capable of processing and transmitting various information such as video, wireless data, etc., out of an initial voice-oriented service.
  • the purpose of a wireless communication system is to enable a large number of users to communicate reliably regardless of location and mobility.
  • a wireless channel is a Doppler due to path loss, noise, fading due to multipath, intersymbol interference (ISI), or mobility of UE.
  • ISI intersymbol interference
  • There are non-ideal characteristics such as the Doppler effect.
  • Various techniques have been developed to overcome the non-ideal characteristics of the wireless channel and to improve the reliability of the wireless communication.
  • MIMO multiple input multiple output
  • MIMO techniques include spatial multiplexing, transmit diversity, beamforming, and the like.
  • the MIMO channel matrix according to the number of receive antennas and the number of transmit antennas may be decomposed into a plurality of independent channels. Each independent channel is called a spatial layer or stream.
  • the number of streams is called rank.
  • ITU International Telecommunication Union
  • 3rd generation is the next generation of mobile communication system after 3rd generation, and provides high-speed transmission rates of downlink 1 Gbps (Gigabits per second) and uplink 500 Mbps (Megabits per second), thereby enabling a multimedia seamless based on IP (internet protocol).
  • Standardization of the IMT-A (Advanced) system which aims to support seamless) services, is in progress.
  • 3GPP LTE-A (Advanced) system is considered as a candidate technology for IMT-A system.
  • the LTE-A system is progressing toward improving the completeness of the LTE system, and is expected to maintain backward compatibility with the LTE system. This is because the compatibility between the LTE-A system and the LTE system is convenient from the user's point of view, and the operator can also reuse the existing equipment.
  • a wireless communication system is a single carrier system that supports one carrier. Since the transmission rate is proportional to the transmission bandwidth, the transmission bandwidth must be increased to support the high rate. However, frequency allocation of large bandwidths is not easy except in some regions of the world.
  • spectral aggregation or bandwidth aggregation, also known as carrier aggregation
  • Spectral aggregation technology is a technique that combines a plurality of physically non-continuous bands in the frequency domain and uses the effect of using a logically large band.
  • spectrum aggregation technology multiple carriers can be supported in a wireless communication system.
  • a wireless communication system supporting multiple carriers is called a multiple carrier system.
  • the carrier may be referred to in other terms such as radio frequency (RF), component carrier, and the like.
  • the uplink control information includes acknowledgment (ACK) / not-acknowledgement (NACK) used for performing a hybrid automatic repeat request (HARQ), channel quality indicator (CQI) indicating a downlink channel state, and radio resource allocation for uplink transmission.
  • ACK acknowledgment
  • NACK not-acknowledgement
  • CQI channel quality indicator
  • SR scheduling request
  • a plurality of terminals in the cell may simultaneously transmit uplink information to the base station.
  • the base station should be able to distinguish uplink information for each terminal transmitted at the same time.
  • uplink information for each terminal is transmitted using a different frequency, the base station can distinguish it.
  • a method of multiplexing multiple terminals using different frequencies is called frequency division multiplexing (FDM).
  • FDM frequency division multiplexing
  • a plurality of terminals in a cell may transmit uplink information using the same time-frequency resource to the base station.
  • orthogonal sequences may be used for uplink information transmission for each terminal. Alternatively, sequences having low correlation may be used.
  • CDM code division multiplexing
  • An object of the present invention is to provide a method and apparatus for transmitting information in a wireless communication system.
  • a method of information transmission performed by a transmitter in a wireless communication system.
  • the method may include generating a first symbol and a second symbol corresponding to information, and generating a first transmission vector and a second transmission vector based on an Alamouti code from the first symbol and the second symbol. And transmitting the first transmission vector through a first antenna and transmitting the second transmission vector through a second antenna, wherein the first transmission vector is a first transmission symbol and a second transmission symbol.
  • the first transmission symbol is transmitted based on a first resource index
  • the second transmission symbol is transmitted based on a second resource index
  • the second transmission vector is a third transmission symbol and a fourth transmission.
  • the third transmission symbol is transmitted based on the first resource index
  • the fourth transmission symbol is transmitted based on the second resource index.
  • the first transmission symbol is generated based on the first symbol
  • the second transmission symbol is generated based on the second symbol
  • the third transmission symbol is a complex conjugate of the second transmission symbol.
  • a negative sign is added to the fourth transmission symbol, and the fourth transmission symbol may be a complex conjugate of the first transmission symbol.
  • the resource index includes a sequence index indicating a sequence, and the sequence spreads the transmission symbol in a frequency domain or a time domain, wherein the first resource index and the second resource index include different sequence indexes. can do.
  • the sequence index indicates a cyclic shift amount
  • the sequence may be generated by cyclically shifting a base sequence by the cyclic shift amount.
  • the sequence index is one sequence index selected from a set of sequence indexes, and the sequences indicated by the sequence indexes may be orthogonal to each other.
  • the resource index includes resource block information indicating a resource block to which a transmission symbol is transmitted and a sequence index indicating a sequence, wherein the sequence spreads the transmission symbol in a frequency domain or a time domain
  • the resource index and the second resource index may include different resource block information or different sequence indexes.
  • the resource index comprises a frequency domain sequence index indicating a frequency domain sequence and a time domain sequence index indicating a time domain sequence, wherein said frequency domain sequence and said time domain sequence comprise a transmission symbol at a time-frequency of two.
  • the first resource index and the second resource index may include different frequency domain sequence indexes or different time domain sequence indexes.
  • the resource index includes resource block information indicating a resource block in which a transmission symbol is transmitted, a frequency domain sequence index indicating a frequency domain sequence, and a time domain sequence index indicating a time domain sequence, wherein the frequency domain sequence And the time domain sequence spreads the transmission symbol into a time-frequency two-dimensional domain, wherein the resource block information included in each of the first resource index and the second resource index, a frequency domain sequence index, and a time domain sequence index. At least one may be different from each other.
  • the method may further comprise obtaining the first resource index and the second resource index.
  • the first symbol may be a first modulation symbol for first information
  • the second symbol may be a second modulation symbol for second information
  • the first information and the second information may be different control information.
  • a modulator for modulating an information bit stream to generate a first symbol and a second symbol, a first configured of a first transmit symbol and a second transmit symbol based on an Alamouti code from the first symbol and the second symbol
  • a space block coding (SBC) processor for generating a first transmission vector and a second transmission vector including a third transmission symbol and a fourth transmission symbol, a first antenna for transmitting the first transmission vector, and a transmission signal for transmitting the second transmission vector
  • SBC space block coding
  • FIG. 1 is a block diagram illustrating a wireless communication system.
  • HARQ hybrid automatic repeat request
  • NACK not-acknowledgement
  • CQI channel quality indicator
  • 3GPP 3rd generation partnership project
  • LTE long term evolution
  • FIG 5 shows an example of a resource grid for one uplink slot in 3GPP LTE.
  • FIG. 6 shows an example of a structure of a downlink subframe in 3GPP LTE.
  • FIG. 7 shows an example of a structure of an uplink subframe in 3GPP LTE.
  • PUCCH physical uplink control channel
  • CP normal cyclic prefix
  • FIG. 10 shows an example of PUCCH format 2 / 2a / 2b transmission in case of normal CP.
  • FIG. 11 shows an example of PUCCH format 2 / 2a / 2b transmission in case of an extended CP.
  • FIG. 12 is a flowchart illustrating an example of an information transmission method.
  • FIG. 13 is a flowchart illustrating another example of an information transmission method.
  • FIG. 14 is a flowchart illustrating still another example of an information transmission method.
  • 15 is a flowchart illustrating an example of an information processing method based on a resource index.
  • 16 is a flowchart illustrating another example of an information processing method based on a resource index.
  • 17 is a flowchart illustrating an information transmission method according to an embodiment of the present invention.
  • FIG. 18 is a block diagram illustrating a transmitter for implementing an embodiment of the present invention.
  • 19 is a flowchart illustrating a method of transmitting information according to another embodiment of the present invention.
  • 20 is a flowchart illustrating a method of transmitting information according to another embodiment of the present invention.
  • 21 shows an example of an information transmission method when the first resource block and the second resource block are the same.
  • FIG 22 shows an example of an information transmission method when the first resource block and the second resource block are different.
  • 23 is a block diagram illustrating an apparatus for wireless communication.
  • 24 is a block diagram illustrating an example of a base station.
  • the following techniques include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be used for various multiple access schemes.
  • SC-FDMA is a method in which an inverse fast fourier transform (IFFT) is performed on complex fourier transform (DFT) spread complex symbols, also called DFT spread-orthogonal frequency division multiplexing (DFTS-OFDM).
  • IFFT inverse fast fourier transform
  • DFT complex fourier transform
  • DFTS-OFDM DFT spread-orthogonal frequency division multiplexing
  • the following technique may be used for a multiple access scheme, such as clustered SC-FDMA, NxSC-FDMA, which is a variation of SC-FDMA.
  • Clustered SC-FDMA is also referred to as clustered DFTS-OFDM, in which DFT spread complex symbols are divided into a plurality of subblocks, and the plurality of subblocks are distributed in a frequency domain and mapped to subcarriers.
  • N ⁇ SC-FDMA is also called a chunk specific DFTS-OFDM in that a code block is divided into a plurality of chunks, and a DFT and an IFFT are performed in chunks.
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented by a wireless technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • E-UTRA Evolved UTRA
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A Advanced is the evolution of 3GPP LTE.
  • FIG. 1 is a block diagram illustrating a wireless communication system.
  • the wireless communication system 10 includes at least one base station 11 (BS).
  • Each base station 11 provides a communication service for a particular geographic area (generally called a cell) 15a, 15b, 15c.
  • the cell can in turn be divided into a number of regions (called sectors).
  • the user equipment (UE) 12 may be fixed or mobile, and may include a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), It may be called other terms such as a wireless modem and a handheld device.
  • the base station 11 generally refers to a fixed station communicating with the terminal 12, and may be referred to as other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, and the like. have.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • access point and the like. have.
  • downlink means communication from the base station to the terminal
  • uplink means communication from the terminal to the base station.
  • a transmitter may be part of a base station, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of a base station.
  • Heterogeneous network refers to a network in which a relay station, a femto cell and / or a pico cell is disposed.
  • downlink may mean communication from a base station to a repeater, a femto cell, or a pico cell.
  • the downlink may mean communication from the repeater to the terminal.
  • the downlink may mean communication from the first relay to the second relay.
  • uplink may mean communication from a repeater, a femtocell or a picocell to a base station.
  • the uplink may mean communication from the terminal to the repeater.
  • uplink may mean communication from a second repeater to a first repeater.
  • the wireless communication system may be any one of a multiple input multiple output (MIMO) system, a multiple input single output (MIS) system, a single input single output (SISO) system, and a single input multiple output (SIMO) system.
  • MIMO multiple input multiple output
  • MIS multiple input single output
  • SISO single input single output
  • SIMO single input multiple output
  • the MIMO system uses a plurality of transmit antennas and a plurality of receive antennas.
  • the MISO system uses multiple transmit antennas and one receive antenna.
  • the SISO system uses one transmit antenna and one receive antenna.
  • the SIMO system uses one transmit antenna and multiple receive antennas.
  • the transmit antenna means a physical or logical antenna used to transmit one signal or stream
  • the receive antenna means a physical or logical antenna used to receive one signal or stream.
  • uplink and / or downlink hybrid automatic repeat request may be supported.
  • a channel quality indicator CQI may be used for link adaptation.
  • ACK HARQ acknowledgment
  • NACK not-acknowledgement
  • a terminal receiving downlink data (DL data) from a base station transmits HARQ ACK / NACK after a predetermined time elapses.
  • the downlink data may be transmitted on a physical downlink shared channel (PDSCH) indicated by a physical downlink control channel (PDCCH).
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • HARQ ACK / NACK becomes ACK when the decoding of the downlink data is successful, and NACK when the decoding of the downlink data fails.
  • the base station may retransmit the downlink data until the ACK is received or the maximum number of retransmissions.
  • a transmission time of HARQ ACK / NACK for downlink data, resource allocation information for HARQ ACK / NACK transmission, and the like may be dynamically informed by the base station through signaling.
  • a transmission time of HARQ ACK / NACK, resource allocation information, and the like may be previously reserved according to the transmission time of the downlink data or the resource used for the transmission of the downlink data.
  • FDD frequency division duplex
  • HARQ ACK / NACK for the PDSCH is transmitted through a physical uplink control channel (PUCCH) in subframe n + 4. Can be.
  • PUCCH physical uplink control channel
  • the terminal may measure the downlink channel state and report the CQI to the base station periodically and / or aperiodically.
  • the base station can be used for downlink scheduling using the CQI.
  • the base station may determine the modulation and coding scheme (MCS) used for transmission using the CQI received from the terminal. If it is determined that the channel state is good by using the CQI, the base station can increase the transmission rate by increasing the modulation order (modulation order) or the coding rate (coding rate). If it is determined that the channel state is not good by using the CQI, the base station may lower the transmission rate by lowering the modulation order or the coding rate. If the transmission rate is low, the reception error rate may be reduced.
  • the CQI may indicate a channel state for all bands and / or a channel state for some bands of all bands.
  • the base station may inform the terminal of the time of transmission of CQI or resource allocation information for CQI transmission.
  • the UE may report a precoding matrix indicator (PMI) and a rank indicator (RI) to the base station.
  • PMI indicates the index of the precoding matrix selected in the codebook
  • RI indicates the number of useful transmission layers.
  • CQI is a concept including PMI and RI in addition to CQI.
  • a terminal first sends a scheduling request (SR) to an eNB for uplink transmission.
  • the SR requests that the terminal requests uplink radio resource allocation to the base station.
  • SR may also be called a bandwidth request.
  • SR is a kind of advance information exchange for data exchange.
  • the terminal In order to transmit uplink data to the base station, the terminal first requests radio resource allocation through the SR.
  • the base station may inform the terminal of the SR transmission time or resource allocation information for SR transmission.
  • the SR may be sent periodically.
  • the base station may inform the terminal of the transmission period of the SR.
  • the base station transmits an uplink grant (UL grant) to the terminal in response to the SR.
  • the uplink grant may be transmitted on the PDCCH.
  • the uplink grant includes information on uplink radio resource allocation.
  • the terminal transmits uplink data through the allocated uplink radio resource.
  • the terminal may transmit uplink control information such as HARQ ACK / NACK, CQI and SR at a given transmission time.
  • uplink control information such as HARQ ACK / NACK, CQI and SR
  • the type and size of uplink control information may vary depending on the system, and the technical spirit of the present invention is not limited thereto.
  • a radio frame consists of 10 subframes, and one subframe consists of two slots. Slots in a radio frame are numbered with slots # 0 through # 19. The time taken for one subframe to be transmitted is called a transmission time interval (TTI). TTI may be referred to as a scheduling unit for data transmission. For example, one radio frame may have a length of 10 ms, one subframe may have a length of 1 ms, and one slot may have a length of 0.5 ms.
  • the structure of the radio frame is merely an example, and the number of subframes included in the radio frame or the number of slots included in the subframe may be variously changed.
  • FIG. 5 is an exemplary diagram illustrating a resource grid for one uplink slot in 3GPP LTE.
  • an uplink slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain and includes N UL resource blocks (RBs) in a frequency domain. do.
  • the OFDM symbol is for representing one symbol period.
  • the OFDM symbol may be a multiple access scheme such as OFDMA, SC-FDMA, clustered SC-FDMA, or N ⁇ SC-FDMA.
  • the OFDM symbol may be referred to as an SC-FDMA symbol, an OFDMA symbol, or a symbol interval according to a system.
  • the resource block includes a plurality of subcarriers in the frequency domain.
  • the number N UL of resource blocks included in an uplink slot depends on an uplink transmission bandwidth set in a cell.
  • Each element on the resource grid is called a resource element.
  • Resource elements on the resource grid may be identified by an index pair (k, l) in the slot.
  • an exemplary resource block includes 7 ⁇ 12 resource elements including 7 OFDM symbols in the time domain and 12 subcarriers in the frequency domain, but the number of subcarriers and the OFDM symbols in the resource block is equal to this. It is not limited. The number of OFDM symbols or the number of subcarriers included in the resource block may be variously changed.
  • the resource block means a general frequency resource. In other words, if the resource blocks are different, the frequency resources are different.
  • the number of OFDM symbols may change depending on the length of a cyclic prefix (CP). For example, the number of OFDM symbols is 7 for a normal CP and the number of OFDM symbols is 6 for an extended CP.
  • CP cyclic prefix
  • a resource grid for one uplink slot may be applied to a resource grid for a downlink slot.
  • FIG. 6 shows an example of a structure of a downlink subframe in 3GPP LTE.
  • the downlink subframe includes two consecutive slots.
  • the maximum 3 OFDM symbols of the first slot in the downlink subframe are the control region, and the remaining OFDM symbols are the data region.
  • the PDSCH may be allocated to the data area. Downlink data is transmitted on the PDSCH.
  • the downlink data may be a transport block which is a data block for a downlink shared channel (DL-SCH) which is a transport channel transmitted during TTI.
  • the base station may transmit downlink data through one antenna or multiple antennas to the terminal.
  • a base station may transmit one codeword through one antenna or multiple antennas to a terminal, and may transmit two codewords through multiple antennas. That is, up to 2 codewords are supported in 3GPP LTE. Codewords are coded bits in which channel coding is performed on information bits corresponding to information. Modulation may be performed for each codeword.
  • control channels such as a physical control format indicator channel (PCFICH), a physical HARQ indicator channel (PHICH), and a PDCCH may be allocated.
  • PCFICH physical control format indicator channel
  • PHICH physical HARQ indicator channel
  • PDCCH Physical Downlink Control Channel
  • the PCFICH carries information on the number of OFDM symbols used for transmission of PDCCHs in a subframe.
  • the control region includes 3 OFDM symbols.
  • the PHICH carries HARQ ACK / NACK for uplink transmission.
  • the control region consists of a set of a plurality of control channel elements (CCE). If the total number of CCEs constituting the CCE set in the downlink subframe is N (CCE), the CCE is indexed from 0 to N (CCE) -1.
  • the CCE corresponds to a plurality of resource element groups. Resource element groups are used to define control channel mappings to resource elements. One resource element group is composed of a plurality of resource elements.
  • the PDCCH is transmitted on an aggregation of one or several consecutive CCEs. A plurality of PDCCHs may be transmitted in the control region.
  • the PDCCH carries downlink control information such as downlink scheduling information, uplink scheduling information, or uplink power control command.
  • the base station transmits downlink data to the terminal on the PDSCH in the subframe
  • the base station carries downlink control information used for scheduling of the PDSCH on the PDCCH in the subframe.
  • the UE may read downlink data transmitted on a PDSCH by decoding the downlink control information.
  • FIG. 7 shows an example of a structure of an uplink subframe in 3GPP LTE.
  • an uplink subframe may be divided into a control region to which a PUCCH carrying uplink control information is allocated and a data region to which a physical uplink shared channel (PUSCH) carrying uplink data is allocated.
  • PUSCH physical uplink shared channel
  • PUCCH for one UE is allocated to an RB pair in a subframe.
  • Resource blocks belonging to a resource block pair occupy different subcarriers in each of a first slot and a second slot.
  • the frequency occupied by RBs belonging to the RB pair allocated to the PUCCH is changed based on a slot boundary. That is, the RBs allocated to the PUCCH are hopped at a slot level.
  • resource block hopping at the slot level is called frequency hopping.
  • m is a location index indicating a logical frequency domain location of a resource block pair allocated to a PUCCH in a subframe.
  • the PUSCH is mapped to an uplink shared channel (UL-SCH) which is a transport channel.
  • the uplink control information transmitted on the PUCCH includes HARQ ACK / NACK, CQI indicating a downlink channel state, SR which is an uplink radio resource allocation request.
  • PUCCH may support multiple formats. That is, uplink control information having a different number of bits per subframe may be transmitted according to a modulation scheme dependent on the application of the PUCCH format.
  • the following table shows an example of a modulation scheme and the number of bits per subframe according to the PUCCH format.
  • PUCCH format 1 is used for transmission of SR
  • PUCCH format 1a / 1b is used for transmission of HARQ ACK / NACK
  • PUCCH format 2 is used for transmission of CQI
  • PUCCH format 2a / 2b is used for transmission of CQI and HARQ ACK / NACK. Used.
  • PUCCH format 1a / 1b When HARQ ACK / NACK is transmitted alone in any subframe, PUCCH format 1a / 1b is used, and when SR is transmitted alone, PUCCH format 1 is used.
  • the UE may simultaneously transmit HARQ ACK / NACK and SR in the same subframe. For positive SR transmission, the UE transmits HARQ ACK / NACK through PUCCH resources allocated for SR, and for negative SR transmission, UE transmits HARQ through PUCCH resources allocated for ACK / NACK. Send ACK / NACK.
  • Control information transmitted on the PUCCH may use a cyclically shifted sequence.
  • the cyclically shifted sequence may be generated by cyclically shifting a base sequence by a specific cyclic shift amount.
  • the specific CS amount is indicated by the cyclic shift index (CS index).
  • Various kinds of sequences can be used as the base sequence.
  • a well-known sequence such as a pseudo-random (PN) sequence or a Zadoff-Chu (ZC) sequence may be used as the base sequence.
  • ZC Zadoff-Chu
  • CAZAC computer generated constant amplitude zero auto-correlation
  • the following equation is an example of a basic sequence.
  • i ⁇ ⁇ 0,1, ..., 29 ⁇ is the root index
  • n the element index
  • 0 ⁇ n ⁇ N-1 N is the length of the base sequence.
  • i may be determined by a cell ID, a slot number in a radio frame, or the like.
  • N may be 12.
  • Different base sequences define different base sequences.
  • b (n) may be defined as shown in the following table.
  • the cyclically shifted sequence r (n, Ics) may be generated by circularly shifting the basic sequence r (n) as shown in the following equation.
  • Ics is a cyclic shift index indicating the amount of CS (0 ⁇ Ics ⁇ N-1, and Ics is an integer).
  • the available cyclic shift index of the base sequence refers to a cyclic shift index derived from the base sequence according to the CS interval (CS interval). For example, if the length of the base sequence is 12 and the CS interval is 1, the total number of available cyclic shift indices of the base sequence is 12. Alternatively, if the length of the base sequence is 12 and the CS interval is 2, the total number of available cyclic shift indices of the base sequence is six.
  • the CS interval may be determined in consideration of delay spread.
  • FIG. 8 illustrates an example of PUCCH format 1 / 1a / 1b transmission in the case of a normal CP. This shows a resource block pair allocated to the first slot and the second slot in one subframe.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • each of the first slot and the second slot includes 7 OFDM symbols.
  • RS reference signal
  • the RS is carried in three contiguous OFDM symbols in the middle of each slot. In this case, the number and position of symbols used for the RS may vary, and the number and position of symbols used for the control information may also change accordingly.
  • PUCCH formats 1, 1a and 1b each use one complex-valued symbol d (0).
  • the complex symbol d (0) for the PUCCH format 1a is a modulation symbol generated by binary bit shift keying (BPSK) modulation of 1-bit HARQ ACK / NACK information.
  • BPSK binary bit shift keying
  • the complex symbol d (0) for PUCCH format 1b is a modulation symbol generated by quadrature phase shift keying (QPSK) modulation of 2 bits of HARQ ACK / NACK information.
  • PUCCH format 1a is for HARQ ACK / NACK information for one codeword
  • PUCCH format 1b is for HARQ ACK / NACK information for two codewords.
  • the following table shows examples of modulation symbols to which HARQ ACK / NACK information bits are mapped according to a modulation scheme.
  • a modulated sequence s (n) is generated using the complex symbol d (0) for the PUCCH format 1 / 1a / 1b and the cyclically shifted sequence r (n, Ics).
  • a modulated sequence s (n) may be generated by multiplying a cyclically shifted sequence r (n, Ics) by a complex symbol d (0) as shown in the following equation.
  • Ics which is a cyclic shift index of the cyclically shifted sequence r (n, Ics)
  • CS hopping may be performed according to the slot number n s in the radio frame and the symbol index l in the slot. Therefore, the cyclic shift index Ics may be expressed as Ics (n s , L).
  • CS hopping may be performed cell-specific to randomize inter-cell interference.
  • the modulated sequence s (n) may be spread using an orthogonal sequence.
  • the terminal multiplexing capacity is the number of terminals that can be multiplexed on the same resource block.
  • Elements constituting the orthogonal sequence correspond to 1: 1 in OFDM symbols carrying control information in order.
  • Each of the elements constituting the orthogonal sequence is multiplied by a modulated sequence s (n) carried in a corresponding OFDM symbol to generate a spread sequence.
  • the spread sequence is mapped to a resource block pair allocated to the PUCCH in the subframe.
  • an IFFT is performed for each OFDM symbol of the subframe to output a time domain signal for control information.
  • the orthogonal sequence is multiplied before the IFFT is performed, but the same result can be obtained even if the orthogonal sequence is multiplied after the IFFT for the modulated sequence s (n).
  • one OFDM symbol on the PUCCH is punctured.
  • the last OFDM symbol of the subframe may be punctured.
  • control information is carried in 4 OFDM symbols in the first slot of the subframe, and control information is carried in 3 OFDM symbols in the second slot of the subframe.
  • Orthogonal sequence index Ios may be hopped to slot level starting from allocated resources.
  • hopping of an orthogonal sequence index of a slot level is referred to as orthogonal sequence remapping.
  • Orthogonal sequence remapping may be performed according to the slot number n s in the radio frame. Therefore, the orthogonal sequence index Ios may be represented by Ios (n s ). Orthogonal sequence remapping may be performed for randomization of intercell interference.
  • the modulated sequence s (n) can be scrambled in addition to spreading using an orthogonal sequence.
  • the modulated sequence s (n) may be multiplied by 1 or j depending on the particular parameter.
  • the RS may be generated using a cyclically shifted sequence and an orthogonal sequence generated from the same basic sequence as the control information.
  • FIG. 9 shows an example of PUCCH format 1 / 1a / 1b transmission in case of an extended CP.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • each of the first slot and the second slot includes 6 OFDM symbols.
  • An orthogonal sequence w Ios (k) having a spreading coefficient K 2 (Ios is an orthogonal sequence index, k is an element index of an orthogonal sequence, and 0 ⁇ k ⁇ K-1) may use a sequence as shown in the following table.
  • the terminal multiplexing capacity is as follows. Since the number of Ics for the control information is 6 and the number of Ios is 3, 18 terminals may be multiplexed per resource block. However, since the number of I'cs for RS is 6 and the number of I'os is 2, 12 UEs can be multiplexed per resource block. Therefore, the terminal multiplexing capacity is limited by the RS part rather than the control information part.
  • FIG. 10 shows an example of PUCCH format 2 / 2a / 2b transmission in case of normal CP.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • RS is carried on 2 OFDM symbols among 7 OFDM symbols included in each slot, and CQI is carried on the remaining 5 OFDM symbols.
  • the number and position of symbols used for the RS may vary, and the number and position of symbols used for the CQI may change accordingly.
  • the terminal performs channel coding on the CQI information bits to generate encoded CQI bits.
  • a block code may be used.
  • An example of a block code is the Reed-Muller code family.
  • A is the size of the CQI information bits. That is, in 3GPP LTE, 20 bits of encoded CQI bits are always generated regardless of the size of CQI information bits.
  • the following table shows an example of 13 basis sequences for the (20, A) block code.
  • n is the base sequence (0 ⁇ n ⁇ 12, n is an integer).
  • the coded CQI bits are generated with a linear combination of 13 basis sequences.
  • the following equation shows an example of the coded CQI bit b i (0 ⁇ i ⁇ 19, i is an integer).
  • a 0 , a 1 , ..., a A-1 is the CQI information bits, and A is the size of the CQI information bits (A is a natural number).
  • the CQI information bit may include one or more fields.
  • a CQI field indicating a CQI index for determining an MCS a precoding matrix indication (PMI) field indicating an index of a precoding matrix selected from a codebook, a rank indication (RI) field indicating a rank, and the like are CQI information bits. Can be included.
  • the following table shows an example of a field included in the CQI information bit and the bit size of the field.
  • the CQI information bit may include only a wideband CQI field having a size of 4 bits. At this time, the size A of the CQI information bit is four.
  • the wideband CQI field indicates the CQI index for the entire band.
  • the following table shows another example of a field included in the CQI information bit and the bit size of the field.
  • the CQI information bit may include a wideband CQI field, a spatial differential CQI field, and a PMI field.
  • the spatial difference CQI field indicates the difference between the CQI index for the full band for the first codeword and the CQI index for the full band for the second codeword.
  • the following table shows another example of a field included in the CQI information bit and a bit size of the field.
  • the 20-bit encoded CQI bit may be scrambled by a UE-specific scrambling sequence to generate a 20-bit scrambled bit.
  • the 20-bit scrambled bit is mapped to 10 modulation symbols d (0), ..., d (9) via QPSK.
  • PUCCH format 2a one bit of HARQ ACK / NACK information is mapped to one modulation symbol d (10) through BPSK modulation.
  • PUCCH format 2b two bits of HARQ ACK / NACK information are mapped to one modulation symbol d (10) through QPSK modulation. That is, in PUCCH format 2a, CQI and 1-bit HARQ ACK / NACK information are simultaneously transmitted.
  • PUCCH format 2b CQI and 2-bit HARQ ACK / NACK information are simultaneously transmitted.
  • d (10) is used for RS generation.
  • d (10) corresponds to one OFDM symbol of 2 OFDM symbols carrying an RS in each slot.
  • phase modulation is performed on the RS carried in the one OFDM symbol in each slot according to the corresponding d (10).
  • PUCCH format 2a / 2b may be supported only for a normal CP. As such, in PUCCH formats 2a and 2b, one modulation symbol is used for RS generation.
  • the cyclic shift index Ics of the cyclically shifted sequence r (n, Ics) may vary according to the slot number n s in the radio frame and the symbol index l in the slot. Therefore, the cyclic shift index Ics may be expressed as Ics (n s , L).
  • the RS may use a cyclically shifted sequence generated from the same basic sequence as the control information.
  • PUCCH format 2 / 2a / 2b does not use orthogonal sequences unlike PUCCH format 1 / 1a / 1b.
  • FIG. 11 shows an example of PUCCH format 2 / 2a / 2b transmission in case of an extended CP.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • each of the first slot and the second slot includes 6 OFDM symbols.
  • RS is carried on 1 OFDM symbol among 6 OFDM symbols of each slot, and control information is carried on the remaining 5 OFDM symbols. Except for this, the example of the normal CP of FIG. 10 is applied as it is.
  • the following information is required for PUCCH format 2/2 / a / 2b transmission.
  • Subcarriers (or resource blocks) to which control information is transmitted, cyclic shift index Ics for control information, and cyclic shift index I'cs for RS are required.
  • the CS interval is 1, the number of Ics for the control information and the I'cs for the RS are 12, respectively, and 12 terminals may be multiplexed per resource block.
  • the CS interval is 2
  • the number of Ics for the control information and the I'cs for the RS are 6, respectively, and six terminals may be multiplexed per resource block.
  • FIG. 12 is a flowchart illustrating an example of an information transmission method.
  • the terminal acquires a resource index (S11).
  • the terminal processes the information based on the resource index (S12).
  • the terminal transmits information to the base station (S13).
  • a plurality of terminals in the cell may simultaneously transmit their information to the base station. At this time, if each terminal uses a different resource, the base station can distinguish the information for each terminal.
  • the information may be control information, user data, information in which various control information are mixed, or information in which control information and user data are multiplexed.
  • the resource may include at least one of a resource block, a frequency domain sequence, and a time domain sequence.
  • Resource blocks are frequency resources over which information is transmitted.
  • the frequency domain sequence is used to spread the symbols corresponding to the information into the frequency domain.
  • the time domain sequence is used to spread the symbol into the time domain. If the resource includes a frequency domain sequence and a time domain sequence, the frequency domain sequence and the time domain sequence are used to spread the symbol into a two-dimensional time-frequency domain (frequency domain and time domain).
  • the resource index identifies a resource used for transmitting information.
  • the resource index may include at least one of resource block information, a frequency domain sequence index, and a time domain sequence index.
  • Resource block information indicates a resource block
  • a frequency domain sequence index indicates a frequency domain sequence
  • a time domain sequence index indicates a time domain sequence.
  • the resource index may include resource block information and a frequency domain sequence index.
  • the sequence may be selected from a sequence set having a plurality of sequences as elements.
  • the plurality of sequences included in the sequence set may be orthogonal to each other or may have low correlation with each other.
  • the resource index may include a sequence index.
  • the sequence may be generated based on the sequence index.
  • the sequence is a frequency domain sequence and / or a time domain sequence.
  • the sequence index may indicate one sequence selected from the sequence set.
  • Each sequence belonging to the sequence set may correspond one-to-one to one sequence index.
  • the sequence index indicates an amount of cyclic shift
  • the sequence may be generated by cyclically shifting a base sequence by the cyclic shift amount.
  • the time-domain sequence is one orthogonal sequence selected from a set of orthogonal sequences
  • the frequency-domain sequence is a cyclic shifted sequence generated by cyclically shifting the base sequence by a cyclic shift amount.
  • the time domain sequence index may be an orthogonal sequence index indicating an orthogonal sequence
  • the frequency domain sequence index may be a cyclic shift index indicating an cyclic shift amount.
  • this is merely an example and does not limit the time domain sequence and / or the frequency domain sequence.
  • a resource consists of a combination of (1) CS amount, (2) orthogonal sequence, and (3) resource block.
  • a resource consists of a combination of (1) CS amount and (2) resource block.
  • the cyclic shift index and the resource block are determined from the resource index.
  • the orthogonal sequence index is also determined from the resource index.
  • the position index m representing the logical frequency domain position of the RB pair allocated to the PUCCH in the subframe may be determined from the resource index.
  • FIG. 13 is a flowchart illustrating another example of an information transmission method.
  • the base station transmits a resource index to the terminal (S21).
  • the terminal processes the information based on the resource index (S22).
  • the terminal transmits information to the base station (23).
  • the base station may explicitly inform the terminal of the resource index.
  • the resource index may be set by higher layer signaling.
  • the upper layer of the physical layer may be a radio resource control (RRC) layer that controls radio resources between the terminal and the network.
  • the information transmitted by the terminal may be SR, semi-persistent scheduling (SPS) ACK / NACK, CQI, or the like.
  • SPS ACK / NACK is HARQ ACK / NACK for downlink data transmitted by semi-static scheduling.
  • a PDCCH corresponding to the PDSCH may not exist.
  • FIG. 14 is a flowchart illustrating still another example of an information transmission method.
  • the base station transmits downlink data to the terminal (S31).
  • the terminal acquires a resource index (S32).
  • the resource index may be obtained from a radio resource through which a control channel for receiving downlink data is transmitted.
  • the terminal processes the information based on the resource index (S33).
  • the terminal transmits information to the base station (S34).
  • the base station may implicitly inform the terminal of the resource index.
  • the information transmitted by the terminal may be dynamic ACK / NACK.
  • Dynamic ACK / NACK is ACK / NACK for downlink data transmitted by dynamic scheduling. In dynamic scheduling, whenever a base station transmits downlink data through a PDSCH, a downlink grant is transmitted to the user equipment through a PDCCH each time.
  • the following equation is an example of determining a resource index (In) for dynamic ACK / NACK transmission.
  • n (CCE) is the first CCE index used for PDCCH transmission for the PDSCH
  • N (1) PUCCH is the number of resource indexes allocated for SR and SPS ACK / NACK.
  • N (1) PUCCH may be set by a higher layer such as an RRC layer.
  • the base station may adjust resources for ACK / NACK transmission by adjusting the first CCE index used for PDCCH transmission.
  • 15 is a flowchart illustrating an example of an information processing method based on a resource index.
  • the terminal determines a cyclic shift index based on the resource index (S41).
  • the terminal generates a cyclically shifted sequence on the basis of the cyclic shift index (S42).
  • the cyclically shifted sequence can be generated by cyclically shifting the base sequence by the amount of cyclic shift obtained from the cyclic shift index.
  • the terminal generates a modulated sequence based on the cyclically shifted sequence and symbols for information (S43).
  • the terminal maps the modulated sequence to the resource block (S44). Resource blocks may be determined based on resource indexes.
  • the terminal transmits the modulated sequence. In this case, the information transmitted by the terminal may be a CQI.
  • 16 is a flowchart illustrating another example of an information processing method based on a resource index.
  • the terminal determines an orthogonal sequence index and a cyclic shift index based on the resource index (S51).
  • the terminal generates a cyclically shifted sequence based on the cyclic shift index (S52).
  • the terminal generates a modulated sequence based on a cyclically shifted sequence and symbols for information (S53).
  • the terminal generates a spread sequence from the modulated sequence based on the orthogonal sequence index (S54).
  • the terminal maps the spread sequence to the resource block (S55). Resource blocks may be determined based on resource indexes.
  • the terminal transmits the spread sequence.
  • the information transmitted by the terminal may be SR, HARQ ACK / NACK.
  • uplink information for each of a plurality of UEs in a cell may be multiplexed and transmitted in a subframe in a code division multiplexing (CDM) and / or frequency division multiplexing (FDM) scheme.
  • CDM code division multiplexing
  • FDM frequency division multiplexing
  • the plurality of terminals may simultaneously transmit information to the base station using different resources.
  • the base station can distinguish information for each terminal transmitted at the same time.
  • the terminal may transmit information through a plurality of transmission antennas.
  • a transmit diversity scheme has diversity gain and may increase reliability of wireless communication.
  • Examples of transmission diversity techniques include cyclic delay diversity (CDD) and precoding vector switching (PVS).
  • CDD cyclic delay diversity
  • PVS precoding vector switching
  • orthogonality is not maintained, transmission diversity gain is limited, or backward compatibility with 3GPP LTE is not satisfied. Accordingly, there is a need to provide an information transmission method using a transmission diversity scheme that can solve the above problems.
  • 17 is a flowchart illustrating an information transmission method according to an embodiment of the present invention.
  • the terminal generates a first symbol and a second symbol corresponding to the information (S110).
  • the terminal generates a first transmission vector and a second transmission vector based on an Alamouti code from the first symbol and the second symbol (S120).
  • the terminal transmits the first transmission vector to the base station through the first antenna, and transmits the second transmission vector to the base station through the second antenna (S130).
  • the first transmission vector is composed of a first transmission symbol and a second transmission symbol, the first transmission symbol is transmitted based on the first resource index, and the second transmission symbol is transmitted based on the second resource index.
  • the second transmission vector is composed of a third transmission symbol and a fourth transmission symbol, the third transmission symbol is transmitted based on the first resource index, and the fourth transmission symbol is transmitted based on the second resource index.
  • SBC space block coding
  • Each of the first symbol and the second symbol is one complex symbol or a plurality of complex symbols.
  • the plurality of complex symbols may be referred to as a sequence or a signal.
  • Each of the first symbol and the second symbol may also be referred to as a first signal and a second signal.
  • Each of the first symbol and the second symbol may be generated by modulating an information bit corresponding to information.
  • each of the first symbol and the second symbol is one modulation symbol or a plurality of modulation symbols.
  • the first symbol may be referred to as a first modulation symbol and the second symbol may be referred to as a second modulation symbol.
  • the first resource index and the second resource index are different from each other. Since the first resource index and the second resource index are different from each other, orthogonality may be maintained between each transmit antenna. If the first resource index and the second resource index are the same, the information may be transmitted through one antenna without transmitting the information by the transmission diversity scheme.
  • the first to fourth transmission symbols may be transmitted as PUCCH format 1 / 1a / 1b or PUCCH format 2 / 2a / 2b, respectively.
  • the SBC information transmission method may be applied to all CDM-based transmission schemes.
  • the first transmission symbol is generated based on the first resource index, and the first transmission sequence is generated, and the second transmission symbol is generated based on the second resource index.
  • the third transmission symbol is generated with a third transmission sequence based on the first resource index, and the fourth transmission symbol is generated with a fourth transmission sequence based on the second resource index.
  • the first transmission sequence and the second transmission sequence may be combined and transmitted through the first antenna.
  • the second transmission sequence and the fourth transmission sequence may be combined and transmitted through the second antenna.
  • the phase of at least one transmission sequence may be shifted.
  • the terminal may phase-shift the second transmission sequence by a specific phase and add it to the first transmission sequence.
  • the terminal may phase-shift the fourth transmission sequence by a specific phase and add the third transmission sequence.
  • the specific phase may be 90 degrees
  • QPSK the specific phase may be 45 degrees.
  • Two resources should be allocated to the RS portion for channel estimation for each of the first and second antennas.
  • Resources allocated to the information portion are not mapped one-to-one with the antenna, but resources allocated to the RS portion may be mapped with the antenna one-to-one. If resources allocated to the RS portion are mapped one-to-one with the antenna, channel orthogonal channel estimation is possible for each antenna.
  • RS is carried on 2 OFDM symbols in one slot.
  • 2 OFDM symbols carrying an RS are referred to as a first RS symbol and a second RS symbol, respectively.
  • the first resource may be transmitted to the first antenna and the second resource may be transmitted to the second antenna in the first RS symbol.
  • the first resource may be transmitted to the second antenna and the second resource may be transmitted to the first antenna in the second RS symbol. That is, resources are swapped across two RS symbols.
  • each resource is composed of different resource blocks, it is possible to achieve channel estimation for each resource block.
  • the resource swapping operation of the slot level may be performed even at the subframe level.
  • the transmitter may be part of an apparatus for wireless communication.
  • the apparatus for wireless communication may be a terminal or a base station.
  • the transmitter 100 includes a modulator 110, an SBC processor 120, and two transmit antennas 190-1 and 190-2.
  • Information bits are input to the modulator 110.
  • the plurality of information bits is also called an information bit stream.
  • coded bits in which channel coding is performed by a channel coding unit may be input to the modulator 110.
  • the modulator 110 generates a first symbol and a second symbol by mapping the information bits to modulation symbols representing positions on the constellation.
  • the information bit corresponds to information to be transmitted by the transmitter 100.
  • the modulation scheme is not limited and may be m-phase shift keying (m-PSK) or m-quadrature amplitude modulation (m-QAM).
  • m-PSK m-phase shift keying
  • m-QAM m-quadrature amplitude modulation
  • Each of the first symbol and the second symbol may be one or a plurality of complex modulation symbols.
  • the following table shows examples of the first symbol s 1 and the second symbol s 2 generated from the information bits according to the modulation scheme.
  • information bits of various bit sizes may be transmitted.
  • a modulation scheme applied to the first symbol and the second symbol may be different.
  • various modulation schemes may be used for information bits of various bit sizes.
  • the information may be divided into first information and second information. That is, the information may include first information and second information. In this case, the information bits corresponding to the information are generated by combining the first information and the second information.
  • the following table is an example of the relationship between the information bits and the first information and the second information.
  • the first information and the second information may be combined in various ways to generate information bits.
  • the first symbol may be a first modulation symbol for first information
  • the second symbol may be a second modulation symbol for second information.
  • the first information and the second information will be described in detail, for example.
  • the first information and the second information may be different control information, different user data, and the like.
  • each of the first information and the second information may be control information for different downlink carriers.
  • the first information may be first control information for the first downlink carrier
  • the second information may be second control information for the second downlink carrier.
  • the first information is a first ACK / NACK for the first data transmitted on the first downlink carrier
  • the second information is a second ACK / NACK for the second data transmitted on the second downlink carrier It may be NACK.
  • the first information may be a first CQI for the first downlink carrier
  • the second information may be a second CQI for the second downlink carrier.
  • control information for each of the first downlink carrier and the second downlink carrier may be transmitted through one uplink carrier.
  • the SBC information transmission method may be used in an asymmetric multicarrier system in which the number of downlink carriers is larger than the number of uplink carriers.
  • the number of downlink carriers to the number of uplink carriers may be used in a multicarrier system having a 2: 1 ratio.
  • each of the first information and the second information may be control information for different codeword groups.
  • Each codeword group includes at least one codeword. Codewords included in each codeword group may be different.
  • the first codeword group may include a first codeword and the second codeword group may include a second codeword.
  • the first codeword group may include a first codeword and a second codeword
  • the second codeword group may include a third codeword and a fourth codeword.
  • the first codeword group may include a first codeword and the second codeword group may include a second codeword and a third codeword.
  • the first information may be first control information for the first codeword group, and the second information may be second control information for the second codeword group.
  • the first information may be a first CQI for the first codeword group
  • the second information may be a second CQI for the second codeword group.
  • the first information may be a first ACK / NACK for the first codeword group
  • the second information may be a second ACK / NACK for the second codeword group.
  • HARQ ACK / NACK information for 4 codewords is the first information
  • HARQ ACK / NACK information for the other 2 codewords is second.
  • the first information and the second information may each be 2 bits, and the first information may be QPSK modulated and mapped to the first symbol, and the second information may be QPSK modulated and mapped to the second symbol.
  • the PUCCH format 1b of 3GPP LTE (Release 8) is extended and 4 bits of HARQ ACK / NACK information may be transmitted.
  • a system supporting 4 codewords may have two downlink carriers, and the number of codewords per downlink carrier is two.
  • a system supporting two codewords may have two downlink carriers, and the number of codewords per downlink carrier may be one.
  • the first information and the second information may be representative information, respectively.
  • the representative information is one piece of information representing a plurality of pieces of information. Representing a plurality of pieces of information as one representative information is referred to as information bundling.
  • the representative information includes representative CQI, representative ACK / NACK, representative PMI, and the like.
  • the representative CQI may be one CQI for a plurality of downlink carriers.
  • the representative CQI may be an average CQI of respective CQIs for a plurality of downlink carriers.
  • the representative CQI may be one CQI representing respective CQIs for a plurality of codewords.
  • the representative ACK / NACK may be one HARQ ACK / NACK for each data transmitted through a plurality of downlink carriers. For example, when the decoding of each data transmitted through the plurality of downlink carriers is all successful, the representative ACK / NACK is ACK, otherwise the representative ACK / NACK is NACK. Alternatively, the representative ACK / NACK may be one HARQ ACK / NACK representing each ACK / NACK for a plurality of codewords.
  • the first information may be first representative information about the first downlink carrier group, and the second information may be second representative information about the second downlink carrier group.
  • the first downlink carrier group may include a first downlink carrier and a second downlink carrier
  • the second downlink carrier group may include a third downlink carrier and a fourth downlink carrier.
  • the first information may be first representative information about the first codeword group
  • the second information may be second representative information about the second codeword group.
  • 2 I 2 + j Q 2 ) shows an example of the constellation mapping method that is generated.
  • the second symbol is zero. In this case, the second symbol is not transmitted, only the first symbol is transmitted.
  • the SBC processor 120 generates a first transmission vector and a second transmission vector based on the Alamouti code from the first symbol and the second symbol output from the modulator.
  • the first antenna 190-1 transmits the first transmission vector
  • the second antenna 190-2 is transmitted through the second transmission vector.
  • the first transmission vector consists of a first transmission symbol and a second transmission symbol
  • the second transmission vector consists of a third transmission symbol and a fourth transmission symbol.
  • the first transmission symbol is transmitted based on the first resource index
  • the second transmission symbol is transmitted based on the second resource index.
  • the third transmission symbol is transmitted based on the first resource index
  • the fourth transmission symbol is transmitted based on the second resource index.
  • a transmission matrix is defined as a 2x2 matrix having a first transmission vector as a first column and a second transmission vector as a second column.
  • (1,1) and (2,1) are the first transmission symbol and the second transmission symbol of the first transmission vector, respectively.
  • (1,2) and (2,2) are the third transmission symbol and the fourth transmission symbol of the second transmission vector, respectively.
  • the first transmission symbol and the fourth transmission symbol have a complex conjugate relationship
  • the second transmission symbol and the third transmission symbol have a complex conjugate relationship
  • a negative sign is assigned to any one of the first transmission symbol to the fourth transmission symbol. Is added.
  • the following table shows various examples of transmission matrices.
  • the first transmission symbol is generated based on the first symbol
  • the second transmission symbol is generated based on the second symbol
  • the third transmission symbol is a complex conjugate of the second transmission symbol.
  • a negative sign is added to the fourth transmission symbol
  • the fourth transmission symbol is a complex conjugate of the first transmission symbol.
  • the third transmission symbol is a complex conjugate of the second transmission symbol
  • the fourth transmission symbol is a negative symbol added to the complex conjugate of the first transmission symbol.
  • the transmission matrix generated based on the Alamouti code from the first symbol and the second symbol may have various forms.
  • Rows and / or columns of the transmission matrix may correspond to a transmission antenna and a resource index.
  • each row of the matrix corresponds to each resource index
  • each column corresponds to each transmit antenna.
  • the first transmission symbol is processed with the first resource index
  • the second transmission symbol is processed with the second resource index and transmitted through the first antenna.
  • the third transmission symbol is processed with the first resource index
  • the fourth transmission symbol is processed with the second resource index and transmitted through the second antenna.
  • the following table shows an example of a transmission matrix generated from four bits of information bits. According to Table 13, a first symbol s 1 and a second symbol s 2 are generated from information bits, and a transmission matrix is generated according to example (1) of Table 14.
  • the information bit when the information bit is '0000', the information bit '0000' is transmitted through the first antenna based on the first resource index and the second resource index, and the information bit '0110' is transmitted through the second antenna. It is equivalent to the case of transmission based on the first resource index and the second resource index (see Table 13).
  • a normalization factor corresponding to the number of transmit antennas may be applied.
  • the following equation shows an example of a normalization factor.
  • Ntx is the number of transmit antennas
  • Nc is the number of resources per antenna.
  • a transmission matrix of the form shown in Example (7) of Table 14 may be generated as shown in the following equation.
  • s 1 is the first symbol
  • s 2 is the second symbol
  • the first transmission vector consists of s (1) and s (2)
  • the second transmission vector consists of s (3) and s (4). 1 / root (4) is the normalization factor.
  • Equation 7 may be arranged as in the following equation.
  • 19 is a flowchart illustrating a method of transmitting information according to another embodiment of the present invention.
  • the terminal acquires a first resource index and a second resource index (S210).
  • the terminal generates a first symbol and a second symbol corresponding to the information (S220).
  • the terminal generates a first transmission vector and a second transmission vector based on the Alamouti code from the first symbol and the second symbol (S230).
  • the terminal transmits the first transmission vector to the base station through the first antenna, and transmits the second transmission vector to the base station through the second antenna (S240).
  • the first transmission vector is composed of a first transmission symbol and a second transmission symbol, the first transmission symbol is transmitted based on the first resource index, and the second transmission symbol is transmitted based on the second resource index.
  • the second transmission vector is composed of a third transmission symbol and a fourth transmission symbol, the third transmission symbol is transmitted based on the first resource index, and the fourth transmission symbol is transmitted based on the second resource index.
  • the terminal may receive the first resource index and the second resource index from the base station.
  • each of the plurality of resource indexes may be directly signaled, such as 0 for the first resource index and 2 for the second resource index.
  • the terminal may implicitly find the first resource index and the second resource index.
  • the first resource index may be obtained from a radio resource for a physical control channel for receiving first downlink data
  • the second resource index may be obtained from a radio resource for a physical control channel for receiving second downlink data.
  • the first resource index is determined through the first CCE index used for PDCCH transmission on the first downlink carrier
  • the second resource index is used for the first CCE index used for PDCCH transmission on the second downlink carrier. Can be determined.
  • the terminal may receive the first resource index from the base station, and obtain the second resource index from the first resource index.
  • the second resource index is predetermined in accordance with the first resource index. For example, when the first resource index is 0, the second resource index is 5, and when the first resource index is 1, the second resource index may be predetermined. If the base station signals only 0 or 1 as the first resource index, the terminal may obtain a second resource index 5 or 6 from the first resource index.
  • the UE may implicitly obtain the first resource index from the first CCE index used for PDCCH transmission for the PDSCH as in 3GPP LTE (Release 8).
  • the second resource index may be explicitly informed by the base station.
  • Physical layer signaling or signaling of an upper layer (eg, RRC) of the physical layer may be used as a method of explicitly indicating the second resource index.
  • the PDCCH may include an information field indicating a second resource index.
  • the UE can implicitly know the first resource index from the first CCE index used for PDCCH transmission.
  • the UE can know the second resource index through RRC signaling.
  • the UE can know the first resource index from the first CCE index used for PDCCH transmission.
  • the UE may know the second resource index through an information field included in the PDCCH.
  • signaling overhead can be reduced by preventing signaling for the entire resource index.
  • it may coexist with a legacy terminal to which 3GPP LTE is applied.
  • the terminal multiplexing capacity of the two antenna transmissions may be kept the same as the terminal multiplexing capacity of one antenna transmission. For example, if 18 terminals are multiplexed for one resource block in the case of one antenna transmission, 18 terminals per resource block may be multiplexed in the case of two antenna transmissions.
  • 20 is a flowchart illustrating a method of transmitting information according to another embodiment of the present invention.
  • the terminal checks the transmission mode (S310).
  • the transmission mode may be divided into one antenna transmission or multiple antenna transmission.
  • the terminal transmits information according to the transmission mode, but when the transmission mode is multi-antenna transmission, transmits the information by the SBC information transmission method (S320).
  • the transmission mode adaptation of the terminal may be performed according to a channel situation or a traffic load situation.
  • the transmission mode may be set semi-statically.
  • the transmission mode may be set by a higher layer such as RRC.
  • RRC Radio Resource Control
  • the SBC information transmission method can be extended to three or more transmit antennas. Three or more transmit antennas may be applied in combination with other transmit diversity schemes. Other transmit diversity techniques include CDD, PVS, frequency switched transmit diversity (FSTD), time switched transmit diversity (TSTD), and the like. For example, when four transmission antennas are used, the SBC information transmission method may be applied to each group by dividing the two transmission antennas into a first group and a second group, and a different transmission diversity scheme may be applied between the groups. .
  • a transmission matrix as shown in Example (1) of Table 14 is generated based on the Alamouti code from the first symbol s 1 and the second symbol s 2 corresponding to the information.
  • y 1 is a first received signal for the first resource index
  • y 2 is called a second received signal for the second resource index.
  • the reception signal y may be separated into the first reception signal y 1 and the second reception signal y 2 through a despreading action. For convenience of explanation, it is assumed that there is one reception antenna of the receiver.
  • the received signal matrix can be expressed as the following equation.
  • h 1 is the channel for the first transmit antenna
  • h 2 is the channel for the second transmit antenna
  • n 1 is the noise of the first received signal
  • n 2 is the noise of the second received signal.
  • the noise may be Additive White Gaussian Noise (AWGN).
  • AWGN Additive White Gaussian Noise
  • Equation 9 may be equivalently expressed as the following equation.
  • Equation 10 may be modified and expressed as in the following equation.
  • H is a Hermitian matrix.
  • the first symbol s 1 and the second symbol s 2 are orthogonally separated.
  • the receiver may obtain diversity gain as shown in the following equation.
  • the MRC technique is one of signal combining techniques for estimating a transmission signal from received signals received by a plurality of receive antennas.
  • the first symbol is called d 1 (0) and the second symbol is called d 2 (0).
  • the first transmission vector comprises a first transmission symbol d 1 (0) and a second transmission symbol -d 2 (0) *
  • the second transmission vector is a third transmission symbol d 2 (0) and a fourth transmission symbol d. Contains 1 (0) * .
  • the first and second embodiments are cases in which resources used for information transmission are composed of sequences only.
  • the resource index includes a sequence index indicating a sequence.
  • the sequence may be a frequency domain sequence or a time domain sequence.
  • the first resource index and the second resource index include different sequence indexes.
  • the first transmission sequence z 1 to the fourth transmission sequence z 4 may be represented by the following equation.
  • the transmission sequence is mapped to the frequency domain. If the sequence is a time domain sequence, the transmission sequence is mapped to the time domain.
  • the r th transmission sequence may be mapped to the time domain or the frequency domain.
  • the r th transmission sequence may be mapped to N subcarriers.
  • the r th transmission sequence may be mapped to N time samples, N chips, or N OFDM symbols.
  • the first transmission sequence and the second transmission sequence are transmitted via the first antenna.
  • the third transmission sequence and the fourth transmission sequence are transmitted via the second antenna.
  • the first embodiment is a case of using a Walsh-Hadamard matrix as a sequence.
  • the following equation represents a 4x4 Walsh-Hadamard matrix.
  • Each of the four rows of the Walsh-Hadamard matrix constitutes a sequence that is orthogonal to each other. 4, like [1, 1, 1, 1], [1, -1, 1, -1], [1, 1, -1, -1] and [1, -1, -1, 1] Sequences can be defined.
  • 3GPP LTE uses three sequences except [1, 1, -1, -1] (see Table 3), but [1, 1, -1, -1] can also be used as a sequence.
  • the first transmission sequence transmitted via the first antenna is [d 1 (0), -d 1 (0), d 1 (0), -d 1 (0)], and the second transmission sequence is [-d 2 (0) * , -d 2 (0) * , d 2 (0) * , d 2 (0) * ].
  • the third transmission sequence transmitted through the second antenna is [d 2 (0), -d 2 (0), d 2 (0), -d 2 (0)], and the fourth transmission sequence is [d 1 ( 0) * , d 1 (0) * , -d 1 (0) * , -d 1 (0) * ].
  • Two estimated symbols may be generated by despreading each of the two resource indices from the received signal.
  • N is the length of the sequence and w m (k) is the k th element of the m th sequence.
  • the first estimated symbol despread using the first sequence from the received signal is referred to as d ' 1 (0)
  • the second estimated symbol despread using the second sequence from the received signal is referred to as d' 2 (0).
  • it can be expressed as the following equation.
  • Equation 17 may be represented by a matrix as in the following equation.
  • Equation 18 may be modified and expressed as in the following equation.
  • the first symbol d 1 (0) and the second symbol d 2 (0) may be detected as in the following equation.
  • the first embodiment is a case of using a discrete Fourier transform (DFT) code as a sequence.
  • DFT discrete Fourier transform
  • the use of the DFT code is equivalent to the cyclic shift of other domains.
  • the use of the DFT code in the time domain is the same as the cyclic shift in the frequency domain.
  • the use of the DFT code in the frequency domain is the same as the cyclic shift in the time domain.
  • the following equation represents a 4x4 DFT code matrix.
  • Each of the four rows of the DFT code matrix constitutes a sequence orthogonal to each other. That is, four sequences of length 4 may be defined from the DFT code matrix.
  • the first transmission sequence z 1 to the fourth transmission sequence z 4 may be represented by the following equation.
  • the first estimated symbol despread for the first sequence w 1 from the received signal is referred to as d ' 1 (0)
  • the second estimated symbol despread for the second sequence w 2 from the received signal is referred to as d' 2.
  • (0) it can be expressed as the following equation.
  • the first symbol d 1 (0) and the second symbol d 2 (0) may be detected as in the following equation.
  • the third embodiment is a case where a resource used for information transmission is composed of a time domain sequence and a frequency domain sequence.
  • the resource index includes a time domain sequence index and a frequency domain sequence index.
  • the time domain sequence and the frequency domain sequence spread the transmission symbols in a two-dimensional domain of time-frequency.
  • the time-domain sequence is one orthogonal sequence selected from a set of orthogonal sequences
  • the frequency-domain sequence is a cyclically shifted sequence generated by cyclically shifting the base sequence by a cyclic shift amount.
  • the time domain sequence index may be an orthogonal sequence index
  • the frequency domain sequence index may be a cyclic shift index indicating an amount of cyclic shift.
  • the first resource index and the second resource index include different frequency domain sequence indexes or different time domain sequence indexes.
  • each row may correspond to a subcarrier
  • each column may correspond to an OFDM symbol.
  • Each element of the matrix may be mapped to a resource element of a resource block used for transmitting information.
  • the matrix consists of 12 rows and 4 columns, but this is only an example and does not limit the number of rows and the number of columns.
  • the first transmission sequence z 1 to the fourth transmission sequence z 4 may be represented by the following equation.
  • the third embodiment can consider the following three cases. (1) when the first and second frequency domain sequence indices are different, and the first and second time domain sequence indices are the same, (2) the first and second frequency domain sequence indices are different, and the first and second (3) the first and second frequency domain sequence indices are identical, and the first and second time domain sequence indices are different.
  • each case will be described.
  • the first resource index indicates 0 as the first frequency domain sequence index and [1, 1, 1, 1] as the first time domain sequence.
  • the second resource index indicates [1, 1, 1, 1] as the second frequency domain sequence index and the second time domain sequence.
  • the first transmission sequence z 1 to the fourth transmission sequence z 4 may be represented by the following equation.
  • the received signal y (n, k) can be expressed as the following equation (0 ⁇ n ⁇ 11, 0 ⁇ k ⁇ 3, n and k are integers).
  • the first estimated symbol despread for the first resource index from the received signal is referred to as d ' 1 (0)
  • the second estimated symbol despread for the second resource index from the received signal is referred to as d' 2 (0). This can be expressed as the following equation.
  • a simple frequency coherent detector may be used or an IFFT-based maximum likelihood detector may be used.
  • Equation 30 may be represented by a matrix as in the following equation.
  • the first symbol d 1 (0) and the second symbol d 2 (0) may be detected as in the following equation.
  • the first resource index indicates 0 as the first frequency domain sequence index and [1, 1, 1, 1] as the first time domain sequence.
  • the second resource index indicates [1, -1, 1, -1] as the second frequency domain sequence index and the second time domain sequence.
  • the first resource index indicates 0 as the first frequency domain sequence index and [1, 1, 1, 1] as the first time domain sequence.
  • the second resource index indicates [1, -1, 1, -1] as 0 and the second time domain sequence as the second frequency domain sequence index.
  • the fourth embodiment is a case where a resource used for information transmission is composed of a time domain sequence, a frequency domain sequence, and a resource block.
  • the resource index includes a time domain sequence index, a frequency domain sequence index, and resource block information.
  • the time-domain sequence is one orthogonal sequence selected from a set of orthogonal sequences
  • the frequency-domain sequence is a cyclically shifted sequence generated by cyclically shifting the base sequence by a cyclic shift amount.
  • the time domain sequence index may be an orthogonal sequence index
  • the frequency domain sequence index may be a cyclic shift index indicating an amount of cyclic shift.
  • the first resource index and the second resource index include different frequency domain sequence indexes or different time domain sequence indexes.
  • the first transmission sequence z 1 to the fourth transmission sequence z 4 may be represented by the following equation.
  • w m (k) is the k th element of the mth orthogonal sequence index
  • Ics m is the m th cyclic shift index
  • the first resource block indicated by the first resource index and the second resource block indicated by the second resource index may be the same or different. Even if the first resource block and the second resource block are the same, orthogonality may be maintained when the first cyclic shift index and the second cyclic shift index are different. In addition, even if the first resource block and the second resource block are the same, orthogonality may be maintained when the first orthogonal sequence index and the second orthogonal sequence index are different. Therefore, the fourth embodiment can consider the following two cases. (1) when the first resource block and the second resource block are the same; (2) when the first resource block and the second resource block are different. Hereinafter, each case will be described.
  • R 1 and R 2 R.
  • the received signal y (n + R, k) can be expressed as the following equation (0 ⁇ n ⁇ 11, 0 ⁇ k ⁇ 3, n and k are integers).
  • the first estimated symbol despread for the first resource index from the received signal is referred to as d ' 1 (0)
  • the second estimated symbol despread for the second resource index from the received signal is referred to as d' 2 (0). This can be expressed as the following equation.
  • the despreading may be performed on an orthogonal sequence after detecting the cyclic shift with the ML based on the IFFT.
  • Equation 35 may be represented by a matrix as in the following equation.
  • the first symbol d 1 (0) and the second symbol d 2 (0) may be detected as in the following equation.
  • R 1 and R 2 are different.
  • the received signals y (n + R 1 , k) and y (n + R 2 , k) can be expressed as the following equations (0 ⁇ n ⁇ 11, 0 ⁇ k ⁇ 3, n and k are integers).
  • the first estimated symbol despread for the first resource index from the received signal is referred to as d ' 1 (0)
  • the second estimated symbol despread for the second resource index from the received signal is referred to as d' 2 (0).
  • the first resource index indicates a first frequency domain sequence index, a first time domain sequence index, and a first resource block
  • the second resource index indicates a second frequency domain sequence index, a second time domain sequence index, and a first resource index.
  • 2 resource blocks may be indicated. At least one of the resource block information, the frequency domain sequence index, and the time domain sequence index included in each of the first resource index and the second resource index is different.
  • the scheduler of the base station may limit the resource index to only one case of the frequency domain sequence shift index, the time domain sequence index, and the resource block as follows.
  • each of the first symbol and the second symbol is a plurality of complex symbols.
  • the first symbol s 1 is d 1 (0), .., d 1 (10)
  • the second symbol s 2 is d 2 (0), .., d 2 (10) Can be.
  • Resources used for information transmission may be composed of a sequence and a resource block.
  • each resource index indicates a sequence index and a resource block.
  • the sequence is a frequency domain sequence and is a cyclically shifted sequence generated by cyclically shifting the base sequence by a cyclic shift amount.
  • the sequence index may be a cyclic shift index indicating the amount of cyclic shift.
  • the first resource index and the second resource index include different sequence indexes or different resource block information.
  • Ics m is the m th cyclic shift index
  • r (n, Ics m ) is the m th cyclic shift sequence.
  • the first resource index may indicate the first sequence index and the first resource block
  • the second resource index may indicate the second sequence index and the second resource block. At least one of the resource block information and the sequence index included in each of the first resource index and the second resource index is different.
  • the scheduler of the base station may limit the resource index in the following cases. (1) when the first and second sequence indices are different and the first and second resource blocks are the same, (2) when the first and second sequence indices are the same and the first and second resource blocks are different. , (3) one of the cases (1) and (2) above.
  • 21 shows an example of an information transmission method when the first resource block and the second resource block are the same.
  • the first transmission vector (first transmission symbol s 1 and second transmission symbol -s 2 * ) is transmitted via a first antenna.
  • the second transmit vector (third transmit symbol s 2 and the fourth transmit symbol s 1 * ) is transmitted via a second antenna.
  • FIG 22 shows an example of an information transmission method when the first resource block and the second resource block are different.
  • the apparatus 50 for wireless communication may be part of a terminal.
  • the device 50 for wireless communication includes a processor 51, a memory 52, an RF unit 53, a display unit 54, a user interface unit, 55).
  • the RF unit 53 is connected to the processor 51 and transmits and / or receives a radio signal.
  • the memory 52 is connected with the processor 51 to store driving systems, applications, and general files.
  • the display unit 54 displays various information of the terminal, and may use well-known elements such as liquid crystal display (LCD) and organic light emitting diodes (OLED).
  • the user interface unit 55 may be a combination of a well-known user interface such as a keypad or a touch screen.
  • the processor 51 performs all the methods related to the above-mentioned information processing and transmission so far.
  • the block diagram of the transmitter shown in FIG. 18 may be implemented in the processor 51.
  • the base station 60 includes a processor 61, a memory 62, a scheduler 63, and an RF unit 64.
  • the RF unit 64 is connected to the processor 61 and transmits and / or receives a radio signal.
  • the processor 61 may perform all the methods related to the above-described information transmission so far.
  • the memory 62 is connected to the processor 61 and stores information processed by the processor 61.
  • the scheduler 63 may be connected to the processor 61 to perform all methods related to scheduling for information transmission, such as the resource index allocation described above.
  • the block diagram of the transmitter shown in FIG. 18 may be implemented in the processor 61.
  • an efficient information transmission method and apparatus can be provided in a wireless communication system.
  • the terminal or the base station can efficiently transmit information using the transmission diversity scheme. Orthogonality may be maintained between each transmit antenna.
  • a method of efficiently transmitting additional information while maintaining compatibility with a single carrier system in a multicarrier system may be provided.
  • 3GPP LTE which supports up to 2 codewords
  • a processor such as a microprocessor, a controller, a microcontroller, an application specific integrated circuit (ASIC), or the like according to software or program code coded to perform the function.
  • ASIC application specific integrated circuit

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

La présente invention concerne un procédé et un appareil pour la transmission d’information dans un système de radiocommunication. Le procédé comprend les étapes suivantes : la création d’un premier symbole et d’un second symbole concernant l’information, la création d’un premier vecteur de transmission et d’un second vecteur de transmission basés sur le code d’Alamouti à partir du premier symbole et du second symbole, et la transmission du premier vecteur de transmission via une première antenne et la transmission du second vecteur de transmission via une seconde antenne.
PCT/KR2009/004479 2008-08-11 2009-08-11 Procédé et appareil pour la transmission d’information dans un système de radiocommunication WO2010018979A2 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US13/058,395 US8385467B2 (en) 2008-08-11 2009-08-11 Method and apparatus for information transmission in a radio communication system
US13/743,176 US8611464B2 (en) 2008-08-11 2013-01-16 Method and apparatus for information transmission in a radio communication system
US14/091,071 US8873673B2 (en) 2008-08-11 2013-11-26 Method and apparatus for information transmission in a radio communication system
US14/495,472 US8989304B2 (en) 2008-08-11 2014-09-24 Method and apparatus for information transmission in a radio communication system
US14/626,744 US9094156B2 (en) 2008-08-11 2015-02-19 Method and apparatus for information transmission in a radio communication system
US14/744,738 US9197383B2 (en) 2008-08-11 2015-06-19 Method and apparatus for information transmission in a radio communication system
US14/886,582 US9537621B2 (en) 2008-08-11 2015-10-19 Method and apparatus for information transmission in a radio communication system
US15/348,797 US9641293B2 (en) 2008-08-11 2016-11-10 Method and apparatus for information transmission in a radio communication system

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US8773708P 2008-08-11 2008-08-11
US61/087,737 2008-08-11
US11447908P 2008-11-14 2008-11-14
US61/114,479 2008-11-14
US11511308P 2008-11-17 2008-11-17
US61/115,113 2008-11-17
US11629808P 2008-11-20 2008-11-20
US61/116,298 2008-11-20
US11723708P 2008-11-24 2008-11-24
US61/117,237 2008-11-24
KR1020090062712A KR101603338B1 (ko) 2008-08-11 2009-07-09 무선 통신 시스템에서 정보 전송 방법 및 장치
KR10-2009-0062712 2009-07-09

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US13/743,176 Continuation US8611464B2 (en) 2008-08-11 2013-01-16 Method and apparatus for information transmission in a radio communication system

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CN108111285A (zh) * 2017-11-17 2018-06-01 中兴通讯股份有限公司 一种传输参考信号的方法及装置
CN108111285B (zh) * 2017-11-17 2021-10-26 中兴通讯股份有限公司 一种传输参考信号的方法及装置

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US9094156B2 (en) 2015-07-28
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US20150010107A1 (en) 2015-01-08
US8989304B2 (en) 2015-03-24
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US20160043837A1 (en) 2016-02-11
US20170063501A1 (en) 2017-03-02
US20150288492A1 (en) 2015-10-08
WO2010018979A3 (fr) 2010-06-17
US9641293B2 (en) 2017-05-02
US9197383B2 (en) 2015-11-24
US8611464B2 (en) 2013-12-17
US20150163025A1 (en) 2015-06-11
KR101603338B1 (ko) 2016-03-15
US8873673B2 (en) 2014-10-28
US20140086358A1 (en) 2014-03-27
US8385467B2 (en) 2013-02-26

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